<template>
  <el-container class="home-container">
    <!-- 头部区域 -->
    <el-header>
      <div>
        <img src="../assets/logo.png" alt="" />
        <span>电商后台管理系统</span>
      </div>
      <el-button type="info" @click="logout">退出</el-button>
    </el-header>
    <!-- 页面主体 -->
    <el-container>
      <!-- 侧边栏 -->
      <el-aside :width="isCollapse ? '64px' : '200px'">
        <div class="iconfont" @click="taggleCollapse">|||</div>
        <!-- 侧边栏菜单区域 -->
        <el-menu
          background-color="#333744"
          text-color="#fff"
          active-text-color="#409bff"
          unique-opened
          :collapse="isCollapse"
          :collapse-transition="false"
          router
          :default-active="activePath"
        >
          <!-- 一级菜单 -->
          <el-submenu
            :index="item.id + ''"
            v-for="(item, index) in menulist"
            :key="item.id"
          >
            <template slot="title">
              <i :class="lconLIist[index]"></i>
              <span>{{ item.authName }}</span>
            </template>
            <!-- 二级菜单 -->
            <el-menu-item
              v-for="i in item.children"
              :key="i.id"
              :index="'/' + i.path"
              @click="saveNavState('/' + i.path)"
            >
              <template slot="title">
                <i class="el-icon-menu"></i>
                <span>{{ i.authName }}</span>
              </template></el-menu-item
            >
          </el-submenu>
        </el-menu>
      </el-aside>
      <!-- 右侧主体 -->
      <el-main><router-view></router-view></el-main>
    </el-container>
  </el-container>
</template>

<script>
import { request } from '../network/reuqest'
export default {
  data() {
    return {
      menulist: [],
      lconLIist: [
        'el-icon-user-solid',
        'el-icon-lock',
        'el-icon-s-goods',
        'el-icon-s-order',
        'el-icon-s-data'
      ],
      isCollapse: false,
      // 被激活的链接地址
      activePath: ''
    }
  },
  created() {
    this.getMenulist()
    this.activePath = window.sessionStorage.getItem('activePath')
  },
  methods: {
    logout() {
      window.sessionStorage.clear()
      this.$router.push('/login')
    },
    // 获取所有的菜单
    async getMenulist() {
      const { data: res } = await request({
        url: 'menus'
      })
      if (res.meta.status !== 200) return this.$message.error(res.meta.msg)
      this.menulist = res.data
    },
    // 点击按钮切换菜单的折叠和展开
    taggleCollapse() {
      this.isCollapse = !this.isCollapse
    },
    // 保存链接的激活状态
    saveNavState(activePath) {
      window.sessionStorage.setItem('activePath', activePath)
      this.activePath = activePath
    }
  }
}
</script>

<style scoped>
.home-container {
  height: 100%;
}
.el-header {
  background-color: #373d41;
  display: flex;
  justify-content: space-between;
  padding-left: 0;
  align-items: center;
  color: #fff;
  font-size: 20px;
}
.el-header div {
  display: flex;
  align-items: center;
}
.el-header span {
  margin-left: 15px;
}
.el-header img {
  width: 50px;
  border-radius: 50%;
}
.el-aside {
  background-color: #333744;
}
.el-aside .el-menu {
  border-right: none;
}
.el-main {
  background-color: #eaedf1;
}
.iconfont {
  background-color: #4a5064;
  color: #fff;
  font-size: 10px;
  line-height: 24px;
  text-align: center;
  letter-spacing: 0.2em;
  cursor: pointer;
}
</style>
